water-circulating pipe

例句：

1. 1. The new water-circulating pipe system greatly improved the efficiency of our water treatment plant.
   新的循环水管系统大大提高了我们水处理厂的效率。
2. 2. The engineer designed a water-circulating pipe that could effectively remove pollutants from the river.
   工程师设计了一种可以有效从河流中去除污染物的循环水管。
3. 3. The water-circulating pipe was installed in the basement to prevent moisture from seeping into the building.
   在地下室安装了循环水管以防止水分渗透到建筑中。